How to Remove Duplicate Values from a PHP Array?

Eliminating Duplicate Array Values in PHP

Ever encountered duplicate elements polluting your PHP arrays? To purify their contents and maintain data integrity, you'll need a technique for removing these redundant values.

Solution: Array_unique

For one-dimensional arrays, the array_unique() function comes to the rescue. As per the PHP documentation, this function:

• Generates a new array devoid of duplicate values.
• Maintains the original keys.
• Skips multi-dimensional arrays.

Example:

<?php
$array = array(1, 2, 2, 3);
$uniqueArray = array_unique($array); // Result: (1, 2, 3)
?>

Reindexing for Clean Slates

If you require re-indexed array elements, consider using the array_values() function in conjunction with array_unique().

Example:

<?php
$array = array(1, 2, 2, 3);
$uniqueArray = array_values(array_unique($array)); // Result: (0 => 1, 1 => 2, 2 => 3)
?>

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